#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2023, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

# snap_create host:parent_image snap_id vmid ds_id

SRC=$1
SNAP_ID=$2
VM_ID=$3
DS_ID=$4

#--------------------------------------------------------------------------------

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/var/lib/one/remotes/tm/tm_common.sh
    LIB_LOCATION=/usr/lib/one
else
    TMCOMMON=$ONE_LOCATION/var/remotes/tm/tm_common.sh
    LIB_LOCATION=$ONE_LOCATION/lib
fi

DRIVER_PATH=$(dirname $0)

source $TMCOMMON
source ${DRIVER_PATH}/../../etc/datastore/ceph/ceph.conf

CEPH_UTILS=${DRIVER_PATH}/../../datastore/ceph/ceph_utils.sh

#-------------------------------------------------------------------------------
# Set dst path and dir
#-------------------------------------------------------------------------------

SRC_HOST=`arg_host $SRC`
SRC_PATH=`arg_path $SRC`

#-------------------------------------------------------------------------------
# Get Image information
#-------------------------------------------------------------------------------

DISK_ID=$(echo "$SRC_PATH" | $AWK -F. '{print $NF}')

XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"

unset i j XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <(onevm show -x $VM_ID| $XPATH \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/SOURCE \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/CLONE \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/CEPH_USER \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/CEPH_KEY \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/CEPH_CONF \
                    /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/TYPE )

RBD_SRC="${XPATH_ELEMENTS[j++]}"
CLONE="${XPATH_ELEMENTS[j++]}"
CEPH_USER="${XPATH_ELEMENTS[j++]}"
CEPH_KEY="${XPATH_ELEMENTS[j++]}"
CEPH_CONF="${XPATH_ELEMENTS[j++]}"
TYPE="${XPATH_ELEMENTS[j++]}"

if [ "$CLONE" = "NO" ]; then
    RBD_DST="${RBD_SRC}"
else
    RBD_DST="${RBD_SRC}-${VM_ID}-${DISK_ID}"
fi

#-------------------------------------------------------------------------------
# Create snapshots
#-------------------------------------------------------------------------------

if [ -n "$CEPH_USER" ]; then
    RBD="$RBD --id ${CEPH_USER}"
fi

if [ -n "$CEPH_KEY" ]; then
    RBD="$RBD --keyfile ${CEPH_KEY}"
fi

if [ -n "$CEPH_CONF" ]; then
    RBD="$RBD --conf ${CEPH_CONF}"
fi

if [ "${TYPE}" != 'RBD' ]; then
    error_message "$script_name: Operation not supported on disk type ${TYPE}"
    exit 1
fi

SNAP_CREATE_CMD=$(cat <<EOF
    set -e -o pipefail

    RBD="${RBD}"

    rbd_check_2 $RBD_DST

    $RBD snap create $RBD_DST@$SNAP_ID
    $RBD snap protect $RBD_DST@$SNAP_ID
EOF
)

ssh_exec_and_log_stdin "$SRC_HOST" "$SNAP_CREATE_CMD" "$CEPH_UTILS" \
                 "Error creating snapshot $RBD_DST@$SNAP_ID"

exit 0
